The 2011–12 season was Peterborough United's 51st season in the Football League, competing in the Football League Championship after being promoted from Football League One, beating Huddersfield Town 3–0 in the Play-off final.

* – Portsmouth deducted ten points

Last updated: 28 April 2012.
Source:

Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.

Sources: For loan start source see "Start source". For loan end source see "End source".
EU = if holds or not a European Union passport; Country: when 2 flags, 1st flag = country that plays for internationally, 2nd flag = country of birth; No. = number on jersey; P = Position (for position name, pause mouse pointer on abbreviation); Name = Name on jersey (for more extensive name, pause mouse pointer on name); In/Out = In: The player came in on loan, Out: The player went out on loan; Loan club = the club that the player moved on loan to or the club that the player came from on loan; Started = the date when the player's loan started; Ended = the date when the player's loan ended.

EU = if holds or not a European Union passport; Country: when 2 flags, 1st flag = country that plays for internationally, 2nd flag = country of birth; N = number on jersey; P = Position (for position name, pause mouse pointer on abbreviation); Name = Name on jersey (for more extensive name, pause mouse pointer on name); Age = age on the day of the signing; Moving from = only indicate the club the player was playing before start playing for this club in this season, for the type of the moving see Status column; Moving to = only indicates the club the player is going to play next, for the type of the moving see Status column; Ends = when the player's current contract ends; n/a = Not applicable.

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